1.2 DRYING EQUIPMENT & USAGE

Question 1

How do dehums work?

Answer 1

Reduce RH by extracting moisture from the air

Question 2

Is drying equipment safe to be near water?

Answer 2

• All is.
• Esp low water voltage (110) & ones fitted with RSD

Question 3

Refrigerant Dehums?

Answer 3

• Preferred temp between 15 degrees and 30 degrees
• Machines designed as Low Grain Refrigerant (LGR) offer a significant improvement to earlier models

Question 4

Desiccant Dehums?

Answer 4

1. Works by adsorption of moisture from the air into a desiccant material
2. Material capable of absorbing moisture when heated and releasing it again
3. Often venting to outside of property

Question 5

Why do desiccant dehums sometimes cause issue?

Answer 5

1. Often requires venting to outside of property so difficulty deploying them, security measures etc.
2. Some can avoid this by having an attached condensing unit

Question 6

What is injection drying?

Answer 6

Small holes into building voids to release trapped moisture

Question 7

What material is injection drying useful for?

Answer 7

Drying behind PB or panelling

Question 8

Heaters of various types may be deployed to raise ambient temps with significant improvement for drying within a built environment, these include:

Answer 8

1. Infrared heaters
2. Indirect heaters
3. Heat mats
4. Microwave heaters

Question 9

High pressure suction compressors are useful for what?

Answer 9

Extracting moisture from beneath flooring and within walls

Question 10

Air scrubbers which contain HEPA filters will keep air free from what?

Answer 10

Small particles such as mould spores, dust or soot particles